Safety-envelop.



c. H. W. KOERNER.

SAFETY BNVELOP.

, APPLICATION FILE]; JUNE 16, 1902.

Patented Apr. 13, 1909.

2 SHEETS-SHEET 1.

Warm; i f ,fim

G. H. W. KOERNER.

SAFETY BNVELOP. APPLIOATION FILED mm: 16, 1909.

Patented Apr. 13, 1909. 2 SHEETS-SHEET 2.

THE NORRIS FITERS cm, WASHINGTON, D. c.

' view of the envelop closed and sealed.

UNITED STATES PATENT QFFICE.

CHARLES HENRY WILLIAM KOERNER, OF GUALALA, CALIFORNIA.

SAFETY-ENVELOP.

To all whom it may concern:

Be it known that I, CHARLES HENRY WIL- LIAM KOERNER, a citizen of theUnited States, residing at Gualala, in the county of Mendocino and Stateof California, have invented certain new and useful Improvements inSafety-Envelops, of which the following is a specification.

This invention relates to safety envelops and has for one of its objectsto provide a simply constructed article of this character which cannotbe opened without detection, and in which the contents are protectedfrom access by unauthorized persons or without the knowledge of therightful recipient.

IVith these and other objects in view, the invention consists in anenvelop having wings projecting from the free edges of its various flapsand gummed and interl'oldable with each. other and with the flaps,thereby effectually sealing the envelop and preventing it from beingopened without detection.

The invention further consists in an envelop having the edges of thebody portion crimped to effectually prevent the re'fastening of theparts when once severed.

The invention further consists in an envelop having interlapping flapsand with wings projecting from the free edges of the flaps andinterfoldable with each other and with the flaps, and a fastening devicecomprising metal plates disposed respectively within and without theenvelop with prongs projecting inwardly and outwardly through theoverlapping portions and clenched against the opposite plate.

The invention further consists in certain novel features of constructionas hereafter shown and described and specifically pointed out in theclaim, and in the drawings illustrative of the preferred embodiment ofthe invention; Figure 1 is a view of the blank from which the envelop isconstructed. Fig. 2 is a view with the end flaps folded over the bodywith the free ends of the end flaps overlapping. Fig. 3 is a view of theenvelop ready for receiving the contents. Fig. 4 a

. 1 5 is a view of the envelop from the addre s side, illustrating oneform of the crimping feature. Fig. 6 is a view similar to Fig. 5illustrating another form of the crimping feature. Fi 7 is a sectionenlarged on the line 77 of ig. 4. Fig. 8 is a view enlarged of the innersealing plate. Fig. 9 is a view enlarged of the outer sealing p ate.Fig. 10

Specification of Letters Patent.

Application filed June 16, 1908.

Patented April 13, 1909.

Serial No. 438,802.

is a sectional view of the two plates clenching through the paper.

The improved envelop comprises a body 10 having the end flaps 1112, backflap 13 and sealing or closure flap 14., the flaps so constructed andarranged that they overlap at their free ends when folded as shown inFig. 4.

Each of the various flaps is provided with wings 15 projectingtherefrom, each wing provided upon one or both faces with adhesivematerial indicated at 16.

The wings do not extend the full length of the edges of the variousflaps, leaving vacancies so that when folded undue thickness of thematerial will not occur at the corners of the envelop and at the centralor meeting point of the flaps.

The fastening device comprising two plates 1719, each having a channeland the plate 17 having a plurality of spurs 18 projecting from its rim,and the plate 19 with spurs 2O projecting from its inner rim, thefastening means being employed as hereafter explained.

The shape of the plates is preferably annular, though square, oblong orother shape may be employed, the idea being, that the spurs of theplates clench through the paper in the opposite channels.

An envelop blank thus constructed is completed by folding the end flaps11-12 inward-1y over the body with the terminals overlapping at thecenter, as shown in Fig. 2. The wings 15 of the end flaps next to theback flap 13 are then folded up the back flap folded over the front andthe adjacent portions of the end flaps and the wings of the back flapinterfolded with those of the end flaps, moisture having been c 1ppliedto the adhesive material thereof, and t 1e parts pressed together tocause them to adhere. This action places the envelop in condition forreceiving the contents, as shown in Fig. 3, after which the innerfastening plate 19 is inserted into the envelop with the spurs 20 nextto the overlapping parts as s iown by dotted lines in Fig. 3, and thespurs thrust through the material. The remain ing wings of the end flapsare then turned outwardly and moisture applied and the closure flap 14folded over and the wings thereof inter-folded with the adjacent wingsof the end fla s and pressure applied to complete the sea ing andlikewise to force the remaining overlapping material over the and theappearance of the erimped or corrugated protruding spurs 20. The outerplate 17 is then placed opposite the inner plate and pressure applied toforce the spurs 18 through the overlapping material and to clench themin the channel of the plate 19, while the s are 20 are correspondinglyclenched in the mannel of the plate 17, thus firmly and inseparablylocking the parts together.

The device is simple in construction, can be readily applied to allsizes of envelope, and to envelops constructed from any kind of paper orsimilar material. As an additional security, the paper of the bodyportion 10 is crimped or corrugated, as shown at 21 next to the edges,to roughen the material, and thus render it impossible to secure thematerial again without detection.

l l ith an envelop thus constructed, if the edges be severed, theroughened portions 21 will effectually prevent the refastening of thesevered portions by pasting ithout detection, as the compressionnecessary to cause the parts to adhere will result in destroying portionand thus expose the attempt to open the envelop. The crimping of thematerial is thus an important feature of the invention, 5 and addsmaterially to its value and effeieney. The intention is to provide onedent ed or roughened surface opposite a smooth surface, rear and front,to prevent refastening of severed ortions around the edges.

Having t us described my invention, what is claimed is;

An envelop comprising a body having 2.

overlapping end flaps, back flap and closure flap, wings extending fromthe free edges of each of said flaps and interfoldable with each otherthe body being indented at intervals at its outer edges, a fasteningdevice comprising a plate having projecting s mm and disposed within theenvelop with t e spurs projecting outwardly through the overlapped flapsand wings, and a plate having projecting spurs and disposed opposite thefirst mentioned plate with the spurs projecting inwardly through theoverlapping flaps and wings, said spurs clenching between the plateswhen pressure is applied thereto.

In testimony whereof I affix my signature,

in presence of two witnesses.

CHARLES HENRY WILLIAM KOERNER.

v itnesses.

J. H. HALLIDAY, C. J. PETERS.

